From ef070dcb3989f553f5d84edf555eebc7e204099d Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Tue, 3 Mar 2015 00:06:35 -0500
Subject: [PATCH] NFS: Don't write enable new pages while an invalidation is
 proceeding

nfs_vm_page_mkwrite() should wait until the page cache invalidation
is finished. This is the second patch in a 2 patch series to deprecate
the NFS client's reliance on nfs_release_page() in the context of
nfs_invalidate_mapping().

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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